[FIX] web: limit the width of the filter field selector

If we use a long enough sequence of field in a custom search filter, the
sequence of fields will overlap the operator or value

Steps to reproduce:
1. Open any view with a search
2. Add a custom filter
3. Use enough related fields in the filter so that it creates a long
   sequence of fields, it will overlap the operator at one point

Solution:
Limit the width of the `o_model_field_selector_value` class and break
its content

opw-3450099

closes odoo/odoo#130675

X-original-commit: 472923933e145b39f995051ebe8b45a75669a707
Signed-off-by: Michaël Mattiello (mcm) <mcm@odoo.com>
Signed-off-by: Guillaume Merlin (megu) <megu@odoo.com>

addons/web/static/src/core/model_field_selector/model_field_selector.scss

@@ -7,6 +7,8 @@
 
     > .o_model_field_selector_value {
         min-height: 20px; // needed when there is no value in it and used standalone
+        max-width: 100%;
+        word-wrap: break-word;
         &:active, &:focus, &:active:focus {
             outline: none;
         }